Metallic composition.



CHARLES J. REED, OF PHILADELPHIA, PENNSYLVANIA.

METALLIC comrosrrron.

To all 'wl'w ln it concern:

Be it known that I, CHARLES J. REED, a

- citizen of the United States, residing in Philadelphia, county ofPhiladelphia, Pennsylvania, have invented certain new and useful Imrovement's in Metallic Compositions, of which-the following is aspecification. My invention relatesto a new composition of metals,-designed particularl for use as a durable bearing for revolving s afts,and the like, wherein the same will be sufficiently hard to resist wearfrom the friction of moving parts in contact therewith and which will besufiiciently hardnot to' be readily worn away in use.

My improved composition consists of lead, arsenic, and copper meltedtogether in suitable roportions for the work intended. I find te'following proportions to give good results as an anti-friction bearingmetal, viz lead, eighty-five parts by weight, arsenic,

ten parts by weight, copper, one torfive parts by weight. a V

I do not limit my-invention tothe proportions above stated, as they maybe varied wlthin 'certamlimits and accomplish substantlally the sameresults in accordance with the work or object required. I havefound-that for bearings for certain uses the proportion of arsenic maybe very much greater than the proportion above given, and

may in some cases be used with advantage to the exteiit of fifty, sixtyor even seventy per cent. of the-totalmixture of lead, arsenic and coper.

. 11 making the composition the metals are meltedand mixed together inany suitable manner, and I find it advantageous, particularly wheretliejproportion of arsenic 1s rela- 'tively high as compared to the leadand copper, to melt the metals and combine them 'm a receptacle whileunder pressure greater than one atmosphere to prevent 'volatilization ofthe arsenic. For'anti-friction bearings the co pen may in some cases be'dispensed wit and the lead and-arsenic be combined togetherby melting;

Specification of Letters Patent. 4

Application filed March 23, 1906. Serial No- 307.697.

' Patented Deo.24,19o7.

I am aware that in metallic mixtures for bearings: lead has been used asthe base metal and that it has been hardened by the addition ofantimony, tin, copper, zinc and other metals, but Lam not aware that formanufacture of such' shot accomplishesanentirelydiflerent result fromthe arsenic in such use lead has been hardened by combin I ing it witharsenic. I-am also aware that" r my composition, for such shotcomposition would not, for the heat as in my improved com osition.

' e I have referred to my improved composition as useful for bearings,it will be purpose of bearings, resist .wear and frictiona understoodthat the vsame m'ay be used for;

other purposes.

Having o I claim is i v v v v 1. The herein described'composition comprisinglead, arsenic, andcopper combined together. I

.2. .The herein described composition comprising lead, arsenic andcopper, the proportion of arsenic being not lessthan ten per cent. a r3. The herein described compositioncomoflead. i:

4. ArraLnti-friction metal comprising lead, arsenic andcopper,theproportion of arsenic beingless than the proportion of lead anddescribed my invention what so prising lead, arsenic and copper, theproportion of copper being less than the proportion

